N5
あぶない
Definition
dangerous, risky, hazardous, perilous, precarious, in danger, in jeopardy, critical, grave, at risk, uncertain, unreliable, insecure, unsteady, doubtful, close (i.e. a close call), narrow, look out!, watch out!
N4
さいご
Definition
last, end, conclusion, latest, most recent, no sooner than, right after (often having negative consequences), one's final moments
N3
ひとこと、いちげん、いちごん
Definition
single word, a few words, brief comment
N2
はみがき
Definition
dental brushing, brushing one's teeth, dentifrice, toothpaste, tooth powder
N1
しゅうき
Definition
cycle, period